Fairchild power controller has linear prediction timing

For power-efficient secondary-side synchronous rectification (SR) designs, Fairchild Semiconductor has introduced the FAN6204 controller which uses linear prediction timing-control.

Not limited to the RDS(ON) of the SR mosfet, the controller can be used in the design of fixed frequency or quasi-resonant (QR) flyback converters and discontinuous or continuous conduction mode (DCM and CCM) operation.

According to the supplier, this technique includes a simple control method without current-sense circuitry, which provides better noise immunity.

With PWM frequency tracking and secondary-side winding voltage detection, the device can operate in both fixed- and variable-frequency systems, making it adaptable to flyback and forward free-wheeling topologies.

Operating current is 1.1mA (typical). 

VDD operating voltage is 5V-28.5V and there is VDD pin over-voltage protection (OVP) and a 12V (typical) gate drive clamp. The device is available in an 8-pin SOP package.

At the PCIM Europe 2011 exhibition which takes place in Nuremberg, Germany on 17-19 May Fairchild will also show:

DC-DC power solutions based on its AccuPower load switch series, 2.8V to 36V integrated load switches, as well as mid-voltage MOSFETs designed to minimise conduction loss, switch node ringing, and to improve the overall efficiency of DC-DC converters.

Lighting solutions like the FAN6300A, a PWM controller which can be used for a 20W dimmable board. This product provides several features to enhance the performance of flyback converters.

There will be the FOD8012, full duplex, bi-directional, high-speed logic gate optocoupler, which supports isolated communications allowing digital signals to communicate between systems without conducting ground loops or hazardous voltages.

Motor solutions including Fairchild’s series 5 smart power modules (SPM) with built-in bootstrap diodes and gate drivers in small packages (29mm x 12mm) for increased manufacturing flexibility.

Poster/Dialog Sessions from Fairchild at PCIM Europe include:

New Medium Voltage Power MOSFETs for Synchronous Rectification – Wonsuk Choi, Dongwook Kim and SungMo Young will discuss how the latest shielded-gate technology can dramatically reduce both on-resistance and gate charge. (PP11, Tuesday, 17 May, 16:00-17:15)

New Generation of Smart Power Module for Home Appliances Motor Drive Applications – Taesung Kwon, Steve Han, Elvis Ma, and Sung-Il Yong will introduce new Motion-SPM™ devices in µ-Mini-DIP packaging which are fully optimized intelligent integrated IGBT inverter modules for home appliance motor drive applications. (PP20, Tuesday, 17 May, 16:00-17:15)

A Power-on Reset Circuit for HVIC Targeting Resiliency Against High Voltage Peak Noise – Paul Jung-Ho Lee, Jong-Mu Lee and Won-Hi Oh will describe a power-on reset circuit that is seamlessly interwoven with an extant UVLO (Under Voltage Lock Out) circuit, thereby adding a minimal number of circuit elements. (PP37, Tuesday, 17 May, 16:00-17:15)

Effect of Inductive Parasitics on the Device Loss and System Efficiency in a DC-DC Synchronous Buck Converter for Computing Applications – Tirthajyoti Sarkar, Ritu Sodhi, Scott Pearson and Steven Sapp, along with Aditya Upadhaya from the Indian Institute of Technology, IND, will discuss how the synchronous buck converter has evolved as the most widely used circuit topology for high-power-density, low-output voltage, high-current switching power conversion for computing applications. (PP107, Wednesday, 18 May, 16:00-17:15)

DC-DC Converter Evaluation with Automated Efficiency Plot Generation – Scott Pearson, Stan Benczkowski, Steven Sapp, Tirthajyoti Sarkar, and Ritu Sodhi will discuss how Spice circuit simulation is a valuable tool when evaluating power MOSFET performance in DC-DC converter applications. (PP109, Wednesday, 18 May, 16:00-17:15)